Rocker member and vehicle

Abstract

A side sill member includes a hollow member and a reinforcing member. The hollow member includes therein mutually facing first surface and second surface. The reinforcing member stands on the first surface or the second surface inside the hollow member. The reinforcing member is a tubular component having a polygonal cross section. A longest side of the polygonal cross section has a groove extending along an axial direction of the tubular component.

The invention claimed is: 
     
       1. A side sill member comprising:
 a hollow member; 
 a reinforcing member; and 
 a first cover, wherein 
 the hollow member comprises therein mutually facing first and second surfaces, 
 the reinforcing member stands on the first surface or the second surface in the hollow member, 
 the reinforcing member is a tubular component having a polygonal cross section, 
 a longest side of the polygonal cross section has a groove extending along an axial direction of the tubular component, 
 the first cover is welded to the reinforcing member to block an end of the reinforcing member near the first surface, and 
 the first cover is welded to the first surface. 
 
     
     
       2. The side sill member according to  claim 1 , wherein
 the first cover is welded to a lateral portion of the hollow member between the first surface and the second surface. 
 
     
     
       3. The side sill member according to  claim 2 , wherein
 the first cover is welded to a part of the hollow member near the second surface with respect to the first surface. 
 
     
     
       4. The side sill member according to  claim 1 , wherein
 a second cover that blocks an end of the reinforcing member near the second surface is welded to the reinforcing member. 
 
     
     
       5. The side sill member according to  claim 1 , wherein
 the polygonal cross section of the reinforcing member is line-symmetric. 
 
     
     
       6. The side sill member according to  claim 1 , wherein
 the reinforcing member is made of a steel material. 
 
     
     
       7. The side sill member according to  claim 1 , wherein
 the hollow member is made of a steel material. 
 
     
     
       8. A vehicle comprising the side sill member according to  claim 1 , the side sill member being installed so that the first surface of the hollow member is situated near an inside of the vehicle and the second surface is situated near an outside of the vehicle.